Four students work to find an estimate for √37. Who is the closest to finding the true statement?

Question

Rhonda: "Use √16 and √25 to estimate."
Ricardo: "I use √25 and √36." *****
Riley: "It should be between √36 and √49."
Rhiannon: Use √49 and √64 to estimate."

I believe the answer is Ricardo (B)

Answer 1

I disagree.
Both numbers are smaller than 37.

Answer 2

It must be Rhiannon then?

Answer 3

My answer is C, because one of the numbers are less than 37 and one is
greater. This gives a better estimate.